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This article mainly introduces the relevant knowledge of "what does python custom exception refer to". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "what python custom exception refers to" can help you solve the problem.

Description

1. Because the error is class, catching an error is an instance of capturing class.

2. Mistakes are not made out of thin air, but deliberately created and thrown. Python's built-in functions throw many types of errors, and functions we write throw errors as well.

Example

# err_raise.pyclass FooError (ValueError): pass def foo (s): n = int (s) if natives 0: raise FooError ('invalid value:% s% s) return 10 / n what are the main applications of foo (' 0') python? 1. Cloud computing, typical application OpenStack.

2. WEB front-end development, many large websites are developed by Python.

3. Artificial intelligence applications, artificial intelligence developed based on big data's analysis and deep learning has essentially been unable to leave python.

4. System operation and maintenance project, the standard configuration of automatic operation and maintenance is python+Django/flask.

5. Financial management analysis, quantitative transaction, financial analysis.

6. Big data's analysis.

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